Furnace-door.



s. P. HOWE.

FURNACE DOOR.

APPLICATION FILED APR. 28, 1908.

Patented Nov. 3, 1908.

UNTTED STATES PATENT OEETQE.

SAMUEL P. HOWE, OF MERCHANTVILLE, NEW JERSEY, ASSIGNOR TO CAMDEN FORGE COMPANY, OF CAMDEN, NEW JERSEY, A CORPORATION OE NEW JERSEY.

FURNACE-DOOR.

Application filed April 28, 1908.

To all whom it may concern:

Be it known that I, SAMUEL P. Hows, a citizen of the United States, residing in Merchantville, New Jersey, have invented certain Improvements in Furnace-Doors, of which the following is a specification.

One object of my invention is to provide a door of the type employed in connection with open hearth or puddling and similar furnaces, which shall be of such a con struction as to require a minimum of repairs and possess a relatively long life under operating conditions.

I further desire to provide a furnace door which shall be of a relatively simple construction and. capable of being conveniently removed and replaced or repaired when necessary; it being desired in addition that the furnace door shall include a system of cooling conduits or pipes, which shall not only keep down the temperature of the door but shall also serve as a portion of the door supporting means.

These objects and other advantageous ends I secure as hereinafter set forth, reference being had to the accompanying drawings, in which Figure 1, is a front elevation of my improved furnace door, and Fig. 2, is a side elevation of the door illustrated in Fig. 1.

In the above drawings A is a plate or block of refractory material such as fire brick, usually of substantially rectangular shape and forming the main portion of the furnace door. At a suitable point in this refractory block there is provided a peep hole a around which is a small frame a supporting a slide a which may be drawn over or removed from the hole at willl In each of the four edges of the block there is a groove or recess extending the whole length thereof and serving on the two sides and bottom of the door for the reception of a water pipe 6 for cooling the same. This pipe is connected at one end to a supply pipe 5 and there is usually a valve 12 between it and said supply for controlling the flow of water. The other end of this pipe 7) is extended above the door, then turned at right angles away from the door, and then extended downwardly in a length If. This latter projects into a suitable drain pipe or receptacle 0 preferably having a funnel shaped mouth c,'it being noted that this latter pipe, as well as the section Specification of Letters Patent.

Patented Nov. 3, 1908.

Serial No. 429,694.

0 extending into it, are so arranged as to be parallel to the line of movement of the furnace door and consequently said section. Z) is at all times in position to discharge into the drain pipe 0 regardless of whether the furnace door is open or closed.

For supporting the furnace door I provide a cross bar (Z extending from the top of the block A and forked at each end so as to em.- brace the adjacent portions of the water pipe 7). Each of these forked ends is provided with a set screw (Z whereby said bar may be rigidly connected to these pipes, and there is at the middle of the cross bar an eye-bolt (Z or other suitable receptacle for the end of a suspending chain.

With the above described arrangement of parts it will be noted that the block of refractory material forming the main portion of the furnace door is'mounted in a frame, three sides of which are formed by the water pipes while its top is formed by the cross bar connected to the suspending means. Moreover, the water pipes are completely concealed and protected in the grooves in the sides and bottom of the said refractory block which, being provided with a groove in its top surface, may be reversed in its frame if its bottom edge should become burned away.

I have found by practical experience that a door constructed as described has a relatively long life and requires but little repair, one reason for this being that the water pipes are capable of maintaining the single block at a relatively low temperature owing to its continuity, while in addition this latter is so supported in the frame that its free expansion under changes of temperature is not interfered with.

1. A furnace door consisting of a substantially rectangular reversible ture of refractory material having longitudinally extending grooves in its edges, with a supporting frame for said structure extending into said grooves.

2. A furnace door consisting of a substantially rectangular structure of refractory material, having longitudinally extending grooves in its edges, with a sup porting frame for said door extending into said grooves, a portion of said supporting structure consisting of water pipes.

3. A furnace door consisting of a body single struc of refractory material, a supporting frame therefor consisting of a cross bar for attach ment to supporting means, and a Water pipe attached to said cross bar and directly carrying the body of refractory material.

4:. A furnace door consisting of a substantially rectangular structure of refractory material having longitudinally extending grooves in its edges, a Water pipe extending in and protected by the grooves in the sides and bottom of said structure, a cross bar extending across the top of said structure and in engagement With the Water pipes, With means for attaching a suspending device to said cross bar.

5. A furnace door consisting of a single integral block of refractory material provided with grooves in its edges, a frame for supporting said block consisting of a Water pipe extending in and protected by said grooves, and means for attaching a suspending device to said frame.

6. A furnace door consisting of a single integral block of refractory material having longitudinally extending grooves in its four edges, a supporting frame for said block consisting of a Water pipe extending in and protected by the grooves at the sides and bottom of the block, a cross bar extending from the top of the block and removably connected to the Water pipes above the sides of the block, and means for connecting a suspending device to said cross bar.

7. A furnace door consisting of a single integral block of refractory material having longitudinally extending grooves in its four edges, a supporting frame for said block consisting of a Water pipe extending in and protected by the grooves at the sides and bottom of the block, a cross bar extending over the top of the block and removably connected to the Water pipes, and means for connecting a suspending device to said cross bar,said block being reversible in the frame. In testimony whereof, I have signed my name to this specification, in the presence of tWo subscribing Witnesses.

SAMUEL P. HOWVE.

Witnesses:

WM. EARLY, A. J. WEEKS. 

